Hey... Just wanted to let you know that I took the spare wire in my
cable connected it to C on the nest and connected the other end to the
White terminal of my 24VAC transformer. After restarting the Nest it
came back without the error message and is...
I have the exact same issue… A 3 zone oil burner with no terminal on the
boiler control panel to connect the C wire. I do have an extra wire so
where/what do I connect it to…?